Author: Uri Blass
Date: 14:42:30 04/24/04
Go up one level in this thread
On April 24, 2004 at 17:06:29, Mike Byrne wrote: >On April 24, 2004 at 12:51:02, Will Singleton wrote: > >>[D]rn1qk2r/p2nbp2/1p2p1p1/2ppP1Np/3P1PP1/P1N1B2Q/1PP4P/R3KR2 w Qkq - 0 16 >> >>Nxf7 is a pretty speculative move, I don't think any other chess program would >>play this. Turns out to be crushing, though. Would be amazing if Hydra saw >>this tactically. > >White(1): rn1qk2r/p2nbp2/1p2p1p1/2ppP1Np/3P1PP1/P1N1B2Q/1PP4P/R3KR2 w Qkq - 0 1 > >White(1): go > time surplus 0.00 time limit 166:39 (166:39)/(30) > time surplus 0.00 time limit 166:39 (166:39)/(30) > depth time score variation (1) > 1 0.00 -2.96 1. f5 Bxg5 2. Bxg5 Qxg5 3. fxe6 fxe6 > 4. gxh5 > 1 0.00 0.33 1. O-O-O > 1-> 0.00 0.33 1. O-O-O > 2 0.00 0.24 1. O-O-O c4 > 2-> 0.02 0.24 1. O-O-O c4 > 3 0.02 0.26 1. O-O-O Nc6 2. dxc5 Nxc5 > 3-> 0.03 0.26 1. O-O-O Nc6 2. dxc5 Nxc5 (s=2) > 4 0.05 0.18 1. O-O-O cxd4 2. Bxd4 Nc6 3. gxh5 Nxd4 > 4. Rxd4 gxh5 > 4-> 0.06 0.18 1. O-O-O cxd4 2. Bxd4 Nc6 3. gxh5 Nxd4 > 4. Rxd4 gxh5 (s=2) > 5 0.08 -1 1. O-O-O > 5 0.08 -0.50 1. O-O-O cxd4 2. Rxd4 Nc6 3. Rdd1 Bxg5 > 4. fxg5 Ndxe5 5. gxh5 gxh5 > 5 0.13 -0.03 1. dxc5 bxc5 2. gxh5 Rxh5 3. Qg3 Nc6 > 5-> 0.17 -0.03 1. dxc5 bxc5 2. gxh5 Rxh5 3. Qg3 Nc6 > 6 0.22 -0.09 1. dxc5 bxc5 2. gxh5 Rxh5 3. Qg2 Bxg5 > 4. fxg5 Nxe5 5. Bxc5 Rxg5 > 6 0.42 0.12 1. Nb5 Nc6 2. dxc5 Nxc5 3. O-O-O a6 > 4. Bxc5 axb5 5. Bxe7 Nxe7 6. gxh5 gxh5 > 6-> 0.53 0.12 1. Nb5 Nc6 2. dxc5 Nxc5 3. O-O-O a6 > 4. Bxc5 axb5 5. Bxe7 Nxe7 6. gxh5 gxh5 > (s=3) > 7 0.88 0.06 1. Nb5 Nc6 2. O-O-O cxd4 3. Nxd4 Nxd4 > 4. Bxd4 Bxg5 5. fxg5 Qxg5+ (s=2) > 7 1.14 +1 1. Nxf7!! > 7 1.19 0.62 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd2 exf5 > 4. gxf5 cxd4 5. fxg6+ Kxg6 <HT> > 7-> 1.19 0.62 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd2 exf5 > 4. gxf5 cxd4 5. fxg6+ Kxg6 <HT> (s=4) > 8 1.30 +1 1. Nxf7!! > 8 1.45 1.18 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd2 Ke8 > 4. fxe6 Nf8 5. gxh5 cxd4 (s=3) > 8-> 1.61 1.18 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd2 Ke8 > 4. fxe6 Nf8 5. gxh5 cxd4 > 9 2.11 1.09 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd1 Ke8 > 4. fxe6 Nf8 5. gxh5 cxd4 > 9-> 2.28 1.09 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd1 Ke8 > 4. fxe6 Nf8 5. gxh5 cxd4 > 10 4.22 1.25 1. Nxf7 Kxf7 2. f5 cxd4 3. fxe6+ Kg8 > 4. Bxd4 Nf8 5. O-O-O Nxe6 6. Kb1 > 10-> 4.80 1.25 1. Nxf7 Kxf7 2. f5 cxd4 3. fxe6+ Kg8 > 4. Bxd4 Nf8 5. O-O-O Nxe6 6. Kb1 > 11 10.55 0.97 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+ > 4. Rxf2 cxd4 5. fxe6+ Ke7 6. Nxd5+ > Kxe6 7. Nf4+ Kxe5 8. Nxg6+ Kd6 9. Nxh8 > Qxh8 10. gxh5 > 11-> 15.31 0.97 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+ > 4. Rxf2 cxd4 5. fxe6+ Ke7 6. Nxd5+ > Kxe6 7. Nf4+ Kxe5 8. Nxg6+ Kd6 9. Nxh8 > Qxh8 10. gxh5 > 12 22.22 +1 1. Nxf7!! > 12 25.53 1.37 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+ > 4. Rxf2 exf5 5. gxf5 cxd4 6. fxg6+ > Kg7 7. Qe6 dxc3 8. Rf7+ Kh6 9. g7+ > Kg5 10. gxh8=Q Qxh8 > 12-> 27.95 1.37 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+ > 4. Rxf2 exf5 5. gxf5 cxd4 6. fxg6+ > Kg7 7. Qe6 dxc3 8. Rf7+ Kh6 9. g7+ > Kg5 10. gxh8=Q Qxh8 >? 13 45.02 1/41* 1. Nxf7 >White(1): ? > time=53.20 cpu=185% mat=0 n=45328093 fh=90% nps=852K > ext-> chk=1736709 cap=179025 pp=128620 1rep=124260 mate=2772 > predicted=0 nodes=45328093 evals=17756672 50move=0 > endgame tablebase-> probes=0 hits=0 > SMP-> split=598 stop=84 data=5/128 cpu=1:38 elap=53.20 > > > >White(1): Nxf7 > time used: 53.20 > >looks pretty sound to me ... Which program did you use Crafty19.12(1 cpu) can find it but it is not so speculative like the program that you used and does not see a score of more than +1 for white. older crafty(19.01) needs more time and finds it only with a negative score at depth 11 and 0.01 score at depth 12 and it may be interesting to know what changes did Bob to teach Crafty to solve it(I guess that the difference is result of evaluation changes and not search changes). Analysis under chessbase Hydra - Diep rn1qk2r/p2nbp2/1p2p1p1/2ppP1Np/3P1PP1/P1N1B2Q/1PP4P/R3KR2 w Qkq - 0 1 Analysis by Crafty 19.12: 16.0-0-0 Bxg5 17.fxg5 cxd4 18.Bxd4 Qxg5+ = (0.18) Depth: 1/16 00:00:00 16.0-0-0 Bxg5 17.fxg5 cxd4 18.Bxd4 Qxg5+ = (0.18) Depth: 2/16 00:00:00 16.0-0-0 Bxg5 17.fxg5 cxd4 18.Bxd4 Qxg5+ = (0.18) Depth: 3/16 00:00:00 16.0-0-0 cxd4 17.Rxd4 Nc6 18.Rdd1 Bxg5 19.fxg5 Ndxe5 20.gxh5 Rxh5 ³ (-0.60) Depth: 4/16 00:00:00 16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg3 Nc6 = (-0.25) Depth: 4/16 00:00:00 16.Nf3 Nc6 17.0-0-0 c4 = (-0.19) Depth: 4/16 00:00:00 16.Nf3 cxd4 17.Bxd4 Nc6 18.0-0-0 Qc7 = (-0.14) Depth: 5/20 00:00:00 16.Nf3 cxd4 17.Nxd4 Bh4+ 18.Bf2 hxg4 19.Qxg4 Bxf2+ 20.Rxf2 Na6 = (-0.14) Depth: 6/20 00:00:00 120kN 16.Nb5 Nc6 17.0-0-0 cxd4 18.Nxd4 Nxd4 19.Bxd4 Bxg5 20.fxg5 Qxg5+ = (-0.09) Depth: 6/20 00:00:01 250kN 16.Nb5 a6 17.Nd6+ Bxd6 18.exd6 c4 19.0-0-0 Nf8 20.f5 Qxd6 21.fxe6 fxe6 = (0.09) Depth: 7/23 00:00:02 507kN 16.Nb5 Nf8 17.dxc5 bxc5 18.0-0-0 a6 19.Nc3 Nbd7 20.Nf3 = (0.10) Depth: 8/26 00:00:07 1884kN 16.Nxf7 Kxf7 17.f5 Bh4+ 18.Kd2 Nf8 19.fxe6+ Ke8 20.gxh5 cxd4 ² (0.32) Depth: 8/26 00:00:09 2447kN 16.Nxf7 Kxf7 17.f5 Bh4+ 18.Kd1 cxd4 19.fxe6+ Kg8 20.Bxd4 Nf8 21.gxh5 Rxh5 ² (0.46) Depth: 9/26 00:00:11 3143kN 16.Nxf7 Kxf7 17.f5 Bh4+ 18.Bf2 Bxf2+ 19.Rxf2 exf5 20.gxf5 cxd4 21.fxg6+ Kxg6 22.Qe6+ Kg5 23.Rf5+ Kh4 24.Rf4+ Kg5 25.Qf5+ Kh6 26.Nxd5 = (0.23) Depth: 10/30 00:00:22 6492kN 16.Nxf7 Kxf7 17.f5 Bh4+ 18.Bf2 Bxf2+ 19.Rxf2 exf5 20.gxf5 cxd4 21.fxg6+ Kg7 22.Rf7+ Kxg6 23.Qe6+ Kg5 24.Qf5+ Kh6 25.Nxd5 ² (0.53) Depth: 11/33 00:00:50 14761kN 16.Nxf7 Kxf7 17.f5 cxd4 18.Bxd4 Nf8 19.0-0-0 Ke8 20.f6 Bc5 21.Bxc5 bxc5 22.gxh5 Rxh5 ² (0.59) Depth: 12/36 00:03:01 58302kN Hydra - Diep rn1qk2r/p2nbp2/1p2p1p1/2ppP1Np/3P1PP1/P1N1B2Q/1PP4P/R3KR2 w Qkq - 0 1 Analysis by Crafty 19.01: 16.dxc5 Nxc5 = (-0.07) Depth: 1/21 00:00:00 16.dxc5 Nxc5 = (-0.07) Depth: 2/21 00:00:00 16.dxc5 bxc5 17.Nf3 = (-0.07) Depth: 3/21 00:00:00 16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg3 = (-0.03) Depth: 4/21 00:00:00 16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg3 Nc6 ³ (-0.33) Depth: 5/21 00:00:00 16.Nb5 cxd4 17.Bxd4 Nc6 18.Nf3 Nxd4 19.Nfxd4 ³ (-0.32) Depth: 5/21 00:00:00 16.Nb5 cxd4 17.Bxd4 Nc6 18.Nf3 a6 ³ (-0.39) Depth: 6/22 00:00:00 64kN 16.Nf3 Nc6 17.dxc5 Nxc5 18.f5 exf5 19.gxf5 ³ (-0.36) Depth: 6/22 00:00:00 114kN 16.Nf3 Nc6 17.Nb5 cxd4 18.Nfxd4 Bh4+ 19.Bf2 Nxd4 20.Nxd4 hxg4 21.Qxg4 ³ (-0.42) Depth: 7/25 00:00:01 236kN 16.Nf3 Nc6 17.Nb5 cxd4 18.Nfxd4 Nxd4 19.Bxd4 Bh4+ 20.Bf2 Be7 ³ (-0.39) Depth: 8/25 00:00:03 628kN 16.Nf3 Nc6 17.Ne2 cxd4 18.Bxd4 a6 19.Ng3 Nxd4 20.Nxd4 Bc5 ³ (-0.53) Depth: 9/29 00:00:07 1685kN 16.Nb5 Nc6 17.f5 exf5 18.gxf5 Nxd4 19.Bxd4 cxd4 20.fxg6 fxg6 ³ (-0.52) Depth: 9/29 00:00:10 2665kN 16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg2 Bxg5 19.fxg5 Nc6 20.Qf2 Ndxe5 21.0-0-0 ³ (-0.42) Depth: 9/29 00:00:14 4043kN 16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg2 Bxg5 19.fxg5 Nc6 20.0-0-0 Ndxe5 21.Qe2 Nc4 ³ (-0.52) Depth: 10/29 00:00:20 5930kN 16.Nb5 Nc6 17.f5 Nxd4 18.fxe6 fxe6 19.Nxd4 Bxg5 20.Nxe6 Bh4+ 21.Bf2 hxg4 22.Bxh4 Rxh4 = (-0.10) Depth: 10/29 00:00:34 10040kN 16.Nb5 cxd4 17.Bxd4 Nc6 18.Qc3 Rc8 19.gxh5 Nb4 20.Nxf7 Kxf7 21.hxg6+ Kxg6 22.Rg1+ µ (-0.73) Depth: 11/31 00:00:53 16689kN 16.dxc5 bxc5 17.Qg2 Bxg5 18.fxg5 Nxe5 19.gxh5 Rxh5 20.Bxc5 Rxg5 21.Qe2 Nbd7 22.h4 ³ (-0.44) Depth: 11/31 00:01:34 30063kN 16.Nf3 Nc6 17.0-0-0 Qc8 18.gxh5 Rxh5 19.Qg2 c4 20.Kb1 Qa6 21.Ng5 ³ (-0.34) Depth: 11/31 00:02:17 43097kN 16.Nxf7 Kxf7 17.f5 Bh4+ 18.Bf2 Bxf2+ 19.Rxf2 exf5 20.gxf5 cxd4 21.fxg6+ Kxg6 22.Qe6+ Kg5 23.Qf5+ Kh6 24.Nxd5 = (-0.07) Depth: 11/31 00:02:42 51734kN 16.Nxf7 Kxf7 17.f5 cxd4 18.fxe6+ Kg8 19.Bxd4 Bh4+ 20.Bf2 Bxf2+ 21.Rxf2 Nxe5 22.g5 Ng4 23.Rd2 = (0.01) Depth: 12/33 00:03:09 60898kN Uri
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